Package org.apache.drill.common.expression

Examples of org.apache.drill.common.expression.TypedNullConstant

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    if (!errorCollector.hasErrors()) {
      out = out.accept(ConditionalExprOptimizer.INSTANCE, null);
    }
   
    if(out instanceof NullExpression){
      return new TypedNullConstant(Types.optional(MinorType.INT));
    }else{
      return out;
    }
  }
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          //            2) the parameter of matchedFuncHolder allows null input, or func's null_handling is NULL_IF_NULL (means null and non-null are exchangable).
          //        then replace NullExpression with a TypedNullConstant
          if (currentArg.equals(NullExpression.INSTANCE) &&
            ( parmType.getMode().equals(TypeProtos.DataMode.OPTIONAL) ||
              matchedFuncHolder.getNullHandling() == FunctionTemplate.NullHandling.NULL_IF_NULL)) {
            argsWithCast.add(new TypedNullConstant(parmType));
          } else if (Types.softEquals(parmType, currentArg.getMajorType(), matchedFuncHolder.getNullHandling() == FunctionTemplate.NullHandling.NULL_IF_NULL) ||
                     matchedFuncHolder.isFieldReader(i)) {
            //Case 2: argument and parameter matches, or parameter is FieldReader.  Do nothing.
            argsWithCast.add(currentArg);
          } else {
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      return matchedConvertToNullableFuncHolder.getExpr(funcName, args, ExpressionPosition.UNKNOWN);
    }

    private LogicalExpression rewriteNullExpression(LogicalExpression expr, MajorType type) {
      if(expr instanceof NullExpression) {
        return new TypedNullConstant(type);
      } else {
        return expr;
      }
    }
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      if(newMinor == MinorType.LATE){
        // if the type still isn't fully bound, leave as cast expression.
        return new CastExpression(input, e.getMajorType(), e.getPosition());
      } else if (newMinor == MinorType.NULL) {
        // if input is a NULL expression, remove cast expression and return a TypedNullConstant directly. 
        return new TypedNullConstant(Types.optional(e.getMajorType().getMinorType()));
      } else {
        // if the type is fully bound, convert to functioncall and materialze the function.
        MajorType type = e.getMajorType();

        // Get the cast function name from the map
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      // materialize value vector readers from join expression
      LogicalExpression materializedLeftExpr;
      if (worker == null || status.isLeftPositionAllowed()) {
        materializedLeftExpr = ExpressionTreeMaterializer.materialize(leftFieldExpr, left, collector, context.getFunctionRegistry());
      } else {
        materializedLeftExpr = new TypedNullConstant(Types.optional(MinorType.INT));
      }
      if (collector.hasErrors())
        throw new ClassTransformationException(String.format(
            "Failure while trying to materialize incoming left field.  Errors:\n %s.", collector.toErrorString()));

      LogicalExpression materializedRightExpr;
      if (worker == null || status.isRightPositionAllowed()) {
        materializedRightExpr = ExpressionTreeMaterializer.materialize(rightFieldExpr, right, collector, context.getFunctionRegistry());
      } else {
        materializedRightExpr = new TypedNullConstant(Types.optional(MinorType.INT));
      }
      if (collector.hasErrors())
        throw new ClassTransformationException(String.format(
            "Failure while trying to materialize incoming right field.  Errors:\n %s.", collector.toErrorString()));
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  @Test
  public void testHashFunctionResolution(@Injectable DrillConfig config) throws JClassAlreadyExistsException, IOException {
    FunctionImplementationRegistry registry = new FunctionImplementationRegistry(config);
    // test required vs nullable Int input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.INT)),
        Types.optional(TypeProtos.MinorType.INT),
        Types.required(TypeProtos.MinorType.INT),
        TypeProtos.DataMode.OPTIONAL,
        registry);

    resolveHash(config,
        new ValueExpressions.IntExpression(1, ExpressionPosition.UNKNOWN),
        Types.required(TypeProtos.MinorType.INT),
        Types.required(TypeProtos.MinorType.INT),
        TypeProtos.DataMode.REQUIRED,
        registry);

    // test required vs nullable float input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.FLOAT4)),
        Types.optional(TypeProtos.MinorType.FLOAT4),
        Types.required(TypeProtos.MinorType.FLOAT4),
        TypeProtos.DataMode.OPTIONAL,
        registry);

    resolveHash(config,
        new ValueExpressions.FloatExpression(5.0f, ExpressionPosition.UNKNOWN),
        Types.required(TypeProtos.MinorType.FLOAT4),
        Types.required(TypeProtos.MinorType.FLOAT4),
        TypeProtos.DataMode.REQUIRED,
        registry);

    // test required vs nullable long input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.BIGINT)),
        Types.optional(TypeProtos.MinorType.BIGINT),
        Types.required(TypeProtos.MinorType.BIGINT),
        TypeProtos.DataMode.OPTIONAL,
        registry);

    resolveHash(config,
        new ValueExpressions.LongExpression(100L, ExpressionPosition.UNKNOWN),
        Types.required(TypeProtos.MinorType.BIGINT),
        Types.required(TypeProtos.MinorType.BIGINT),
        TypeProtos.DataMode.REQUIRED,
        registry);

    // test required vs nullable double input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.FLOAT8)),
        Types.optional(TypeProtos.MinorType.FLOAT8),
        Types.required(TypeProtos.MinorType.FLOAT8),
        TypeProtos.DataMode.OPTIONAL,
        registry);
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      }
    }
  }

  private static final TypedNullConstant createNullExpr(MinorType type) {
    return new TypedNullConstant(Types.optional(type));
  }
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  @Test
  public void testHashFunctionResolution(@Injectable DrillConfig config) throws JClassAlreadyExistsException, IOException {
    FunctionImplementationRegistry registry = new FunctionImplementationRegistry(config);
    // test required vs nullable Int input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.INT)),
        Types.optional(TypeProtos.MinorType.INT),
        Types.required(TypeProtos.MinorType.INT),
        TypeProtos.DataMode.OPTIONAL,
        registry);

    resolveHash(config,
        new ValueExpressions.IntExpression(1, ExpressionPosition.UNKNOWN),
        Types.required(TypeProtos.MinorType.INT),
        Types.required(TypeProtos.MinorType.INT),
        TypeProtos.DataMode.REQUIRED,
        registry);

    // test required vs nullable float input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.FLOAT4)),
        Types.optional(TypeProtos.MinorType.FLOAT4),
        Types.required(TypeProtos.MinorType.FLOAT4),
        TypeProtos.DataMode.OPTIONAL,
        registry);

    resolveHash(config,
        new ValueExpressions.FloatExpression(5.0f, ExpressionPosition.UNKNOWN),
        Types.required(TypeProtos.MinorType.FLOAT4),
        Types.required(TypeProtos.MinorType.FLOAT4),
        TypeProtos.DataMode.REQUIRED,
        registry);

    // test required vs nullable long input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.BIGINT)),
        Types.optional(TypeProtos.MinorType.BIGINT),
        Types.required(TypeProtos.MinorType.BIGINT),
        TypeProtos.DataMode.OPTIONAL,
        registry);

    resolveHash(config,
        new ValueExpressions.LongExpression(100L, ExpressionPosition.UNKNOWN),
        Types.required(TypeProtos.MinorType.BIGINT),
        Types.required(TypeProtos.MinorType.BIGINT),
        TypeProtos.DataMode.REQUIRED,
        registry);

    // test required vs nullable double input
    resolveHash(config,
        new TypedNullConstant(Types.optional(TypeProtos.MinorType.FLOAT8)),
        Types.optional(TypeProtos.MinorType.FLOAT8),
        Types.required(TypeProtos.MinorType.FLOAT8),
        TypeProtos.DataMode.OPTIONAL,
        registry);
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        // materialize value vector readers from join expression
        LogicalExpression materializedLeftExpr;
        if (worker == null || status.isLeftPositionAllowed()) {
          materializedLeftExpr = ExpressionTreeMaterializer.materialize(leftFieldExpr, left, collector, context.getFunctionRegistry());
        } else {
          materializedLeftExpr = new TypedNullConstant(Types.optional(MinorType.INT));
        }
        if (collector.hasErrors()) {
          throw new ClassTransformationException(String.format(
              "Failure while trying to materialize incoming left field.  Errors:\n %s.", collector.toErrorString()));
        }

        LogicalExpression materializedRightExpr;
        if (worker == null || status.isRightPositionAllowed()) {
          materializedRightExpr = ExpressionTreeMaterializer.materialize(rightFieldExpr, right, collector, context.getFunctionRegistry());
        } else {
          materializedRightExpr = new TypedNullConstant(Types.optional(MinorType.INT));
        }
        if (collector.hasErrors()) {
          throw new ClassTransformationException(String.format(
              "Failure while trying to materialize incoming right field.  Errors:\n %s.", collector.toErrorString()));
        }
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    if (!errorCollector.hasErrors()) {
      out = out.accept(ConditionalExprOptimizer.INSTANCE, null);
    }

    if (out instanceof NullExpression) {
      return new TypedNullConstant(Types.optional(MinorType.INT));
    } else {
      return out;
    }
  }
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Related Classes of org.apache.drill.common.expression.TypedNullConstant

  • org.apache.drill.exec.expr.ExpressionTreeMaterializer
  • org.apache.drill.exec.expr.ExpressionTreeMaterializer$MaterializeVisitor
  • org.apache.drill.exec.physical.impl.join.MergeJoinBatch
  • org.apache.drill.exec.physical.impl.TestSimpleFunctions
  • org.apache.drill.exec.planner.logical.DrillOptiq
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